WRITE button: clickable even with no image or target selected using card with existing image

[tagoylo]

Environment: OS: macOS 12 SW Version: v1.0.0-rc2

Describe the bug: When using an SD card with existing image (Kuiper.json supported), the WRITE button can be clicked even if there is no target yet to be selected or image source selected.

Steps (no image source selected) :

1. Use an sd card with existing image (Kuiper.json supported)
2. Open kuiper imager.
3. Select that as storage, then click no if a prompt occurs.
4. It can be observed that WRITE button is clickable even if there is no image source selected yet.
5. Clicking WRITE has no response in this case but it is clickable.
6. Screenshot:

Steps (no target selected) :

1. Use an sd card with existing image (Kuiper.json supported)
2. Open kuiper imager.
3. Select that as storage, then click yes if a prompt occurs to configure existing content of image.
4. It can be observed that WRITE button is clickable even if there is no target selected yet.
5. Click WRITE, then it would show a prompt that configuration complete.
6. Screenshot:

Note: It must go through this prompt to replicate the issue. Because when selecting again the storage the second time, WRITE becomes not clickable.

[tagoylo]

Issue no longer reproducible in RC3. Closing this item as it is fixed.